In the Centerville Botanical Gardens, all tulip trees are older than any maples. A majority, but not all of the garden's sycamores are older than any of its maples. All the garden's maples are older than any of its dogwoods.

When you doing LSAT problems you have a tendency to want to employ all the new skills you've learned. Don't. Employ as few skills as you can per question.

Here. There is only one you need really. Diagramming. Take the sentences and play a little simon says.

'All tulip trees are older than any maples' -- T > M

'A majority, but not all of the garden's sycamores are older than any of its maples' -- This means, most are older, some are younger. Use the same lingo we did before. S (most) > M > S (some)

Now, the important thing here is to be able to read and understand quickly your diagram. The whole point of the diagram is to pick up new pieces of information that is made obvious through the relationship of the three sentences.